Citation:
A myofibril is a long, filamentous organelle found within muscle cells that is responsible for the contraction of muscle fibers. It is composed of a series of sarcomeres, which are the basic units of muscle contraction.
The structural unit of a myofibril in striated muscle, consisting of a dark band and the nearer half of each adjacent pale band.
A protein that forms (together with myosin) the contractile filaments of muscle cells, and is also involved in motion in other types of cells.
A fibrous protein that forms (with actin) the contractile filaments of muscle cells and is also involved in motion in other types of cells